Pinwheel



FIG. 1 is a front elevational view of a pinwheel showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a rear elevational view thereof; and,

FIG. 4 is a cross-sectional view thereof, taken along line 4--4 in FIG. 3. 

The ornamental design for a pinwheel, substantially shown and described. 